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Indexed by:会议论文

Date of Publication:2010-01-01

Included Journals:CPCI-S

Volume:1233

Page Number:1423-+

Key Words:earth pressure; nonlinear elastic constitutive model; pressure transportation factor; numerical simulation

Abstract:Model parameters of conditioned soils in head chamber of shield machine are determined based on tree -axial compression tests in laboratory. The loads acting on tunneling face are estimated according to static earth pressure principle. Based on Duncan-Chang nonlinear elastic constitutive model, the earth pressures on head chamber of shield machine are simulated in different aperture ratio cases for rotating cutterhead of shield machine. Relationship between pressure transportation factor and aperture ratio of shield machine is proposed by using aggression analysis.